US4455730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbine blade extractor
Assignee: Siemens Energy Inc
•
Filing: 1982-08-30
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Granted: 1984-06-26
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Expires: 2002-08-30
Abstract
Abstract An axial flow compressor blade extractor utilizing a pair of hydraulic C clamps to position a plunger so that it is aligned with the blade root and a hydraulic cylinder and rocker arm for transmitting a force to the plunger to shear the pin which affixes the blade to the blade groove and moves the blade therein.
Inventors
- 👤 Paul Guenther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:16
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/28; F01D25/285; B; B23; B23P; B23P15/00; B23P15/02; B23P19/00; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53796; Y10T29/5383
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
158 words
Apparatus for removing blades affixed in a generally axially oriented groove by a pin from a rotor of an axial flow machine having multiple rows of blades, said apparatus comprising: a base portion which fits between adjacent rows of blades; a plunger slidably disposed in said base portion so as to be axially aligned with said groove; means for applying a force to said plunger sufficient to shear one of said pins and move one of said blades in one of said grooves; said means for applying a force comprising a hydraulic cylinder, a rocker arm pivotally mounted in the base portion, one end thereof contacting the plunger and the other end receiving the force from the hydraulic cylinder, and a spring interposed between the hydraulic cylinder and the rocker arm; and means for clamping said base adjacent one of said blades and for resisting the reactive forces on said base when force is applied to said plunger.
Claim 2
Dependent Claim
158 words
Apparatus for removing blades affixed in a generally axially oriented groove by a pin from a rotor of an axial flow machine having multiple rows of blades, said apparatus comprising: a base portion which fits between adjacent rows of blades; a plunger slidably disposed in said base portion so as to be axially aligned with said groove; means for applying a force to said plunger sufficient to shear one of said pins and move one of said blades in one of said grooves; said means for applying a force comprising a hydraulic cylinder, a rocker arm pivotally mounted in the base portion, one end thereof contacting the plunger and the other end receiving the force from the hydraulic cylinder, and a spring interposed between the hydraulic cylinder and the rocker arm; and means for clamping said base adjacent one of said blades and for resisting the reactive forces on said base when force is applied to said plunger.
Claim 3
Dependent Claim
20 words
Apparatus as set forth in claim 1, wherein the cylinder is disposed at right angle with respect to the plunger.
Claim 4
Dependent Claim
33 words
Apparatus as set forth in claim 1, wherein the clamping and force resisting means comprises at least one hydraulic cylinder disposed in a member cooperating with the base to form a C-shaped bracket.
Claim 5
Dependent Claim
47 words
Apparatus as set forth in claim 1, wherein the clamping and force resisting means comprises a pair of hydraulic cylinders disposed in a pair of members cooperating with the base to form a pair of C-shaped brackets, which contact the rotor on opposite sides of the groove.
Claim 6
Dependent Claim
19 words
Apparatus as set forth in claim 4, wherein the pair of hydraulic cylinders fit between adjacent rows of blades.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-26 | 1987-12-26 | 1988-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-26 | 1991-12-26 | 1992-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-26 | 1995-12-26 | 1996-06-26 | $7700.00 | Window Closed / Lapsed |